testflinger_yaml_generator: apt install pipx and other tools on agent (#99)

Author: Artur-at-work

Tools/PC/testflinger_yaml_generator/template/shell_scripts/15_install_checkbox_on_agent

@@ -4,7 +4,7 @@
 # this way the versions will match
 sudo add-apt-repository -y ppa:checkbox-dev/beta
 sudo apt update
-sudo DEBIAN_FRONTEND=noninteractive apt install -yqq checkbox-ng
+sudo DEBIAN_FRONTEND=noninteractive apt install -yqq checkbox-ng python3-venv sshpass jq pipx
 
 echo "Installing checkbox in agent container"
 CHECKBOX_VERSION=$(_run $CHECKBOX_CLI_CMD --version)